Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?

The origin, extent, and timing of intraplate contraction in Patagonia are among the least understood geological processes of southern South America. Particularly, the intraplate Deseado fold-thrust belt (FTB), located in the Patagonian broken foreland (47°–48°300 S), is one of the most enigmatic are...

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Autores: Gianni, Guido Martin, Navarrete Granzotto, César Rodrigo, Liendo, Ingrid Florencia, Díaz, Marianela Ximena Yasmin, Gimenez, Mario Ernesto, Encinas, Alfonso, Folguera Telichevsky, Andres
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:Argentina
Institución:Consejo Nacional de Investigaciones Científicas y Técnicas
Repositorio:CONICET Digital (CONICET)
Idioma:inglés
OAI Identifier:oai:ri.conicet.gov.ar:11336/156162
Acceso en línea:http://hdl.handle.net/11336/156162
Access Level:acceso abierto
Palabra clave:ARC MIGRATION
BROKEN FORELAND
GROWTH STRATA
INTRAPLATE CONTRACTION
PATAGONIAN ANDES
SYNOROGENIC DEPOSITS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
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oai_identifier_str oai:ri.conicet.gov.ar:11336/156162
network_acronym_str AR
network_name_str Argentina
repository_id_str
dc.title.none.fl_str_mv Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?
title Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?
spellingShingle Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?
Gianni, Guido Martin
ARC MIGRATION
BROKEN FORELAND
GROWTH STRATA
INTRAPLATE CONTRACTION
PATAGONIAN ANDES
SYNOROGENIC DEPOSITS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
title_short Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?
title_full Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?
title_fullStr Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?
title_full_unstemmed Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?
title_sort Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?
dc.creator.none.fl_str_mv Gianni, Guido Martin
Navarrete Granzotto, César Rodrigo
Liendo, Ingrid Florencia
Díaz, Marianela Ximena Yasmin
Gimenez, Mario Ernesto
Encinas, Alfonso
Folguera Telichevsky, Andres
author Gianni, Guido Martin
author_facet Gianni, Guido Martin
Navarrete Granzotto, César Rodrigo
Liendo, Ingrid Florencia
Díaz, Marianela Ximena Yasmin
Gimenez, Mario Ernesto
Encinas, Alfonso
Folguera Telichevsky, Andres
author_role author
author2 Navarrete Granzotto, César Rodrigo
Liendo, Ingrid Florencia
Díaz, Marianela Ximena Yasmin
Gimenez, Mario Ernesto
Encinas, Alfonso
Folguera Telichevsky, Andres
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv ARC MIGRATION
BROKEN FORELAND
GROWTH STRATA
INTRAPLATE CONTRACTION
PATAGONIAN ANDES
SYNOROGENIC DEPOSITS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
topic ARC MIGRATION
BROKEN FORELAND
GROWTH STRATA
INTRAPLATE CONTRACTION
PATAGONIAN ANDES
SYNOROGENIC DEPOSITS
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description The origin, extent, and timing of intraplate contraction in Patagonia are among the least understood geological processes of southern South America. Particularly, the intraplate Deseado fold-thrust belt (FTB), located in the Patagonian broken foreland (47°–48°300 S), is one of the most enigmatic areas. In this belt, time constraints on tectonic events are limited and synorogenic deposits have not been documented so far. Furthermore, the driving mechanism for intraplate contraction remains unknown. In this study, we carried out a structural and sedimentological analysis. We report the first syntectonic deposits in this area in the Baqueró (Aptian) and Chubut (Cenomanian/Campanian) groups and a newly found unit referred to as the Albian beds (109.9 ± 1.5 Ma). Thus, several contractional stages in late Aptian, Albian, and Cenomanian-Campanian are then inferred. We suggest that the Deseado FTB constituted the southernmost expression of the early Patagonian broken foreland in Cretaceous times. Additionally, we analyzed the spatiotemporal magmatic arc behavior as a proxy of dynamic changes in the Andean subduction during determined stages of intraplate contraction. We observe a significant arc broadening from ~121 to 82 Myr and magmatic quiescence after ~67 Ma. This is interpreted as a slab shallowing to flattening process. Far-field tectonic forces would have been produced by increased plate coupling linked to the slab flattening as indirectly indicated by the correlation between Cretaceous arc expansion and intraplate contraction. Finally, the tectonic evolution of the Deseado FTB favors studies supporting inception of Andean shortening since Cretaceous times.
publishDate 2018
dc.date.none.fl_str_mv 2018-08-13
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/156162
Gianni, Guido Martin; Navarrete Granzotto, César Rodrigo; Liendo, Ingrid Florencia; Díaz, Marianela Ximena Yasmin; Gimenez, Mario Ernesto; et al.; Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?; American Geophysical Union; Tectonics; 37; 9; 13-8-2018; 2915-2937
0278-7407
1944-9194
CONICET Digital
CONICET
url http://hdl.handle.net/11336/156162
identifier_str_mv Gianni, Guido Martin; Navarrete Granzotto, César Rodrigo; Liendo, Ingrid Florencia; Díaz, Marianela Ximena Yasmin; Gimenez, Mario Ernesto; et al.; Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?; American Geophysical Union; Tectonics; 37; 9; 13-8-2018; 2915-2937
0278-7407
1944-9194
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018TC005173
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018TC005173
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv American Geophysical Union
publisher.none.fl_str_mv American Geophysical Union
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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spelling Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?Gianni, Guido MartinNavarrete Granzotto, César RodrigoLiendo, Ingrid FlorenciaDíaz, Marianela Ximena YasminGimenez, Mario ErnestoEncinas, AlfonsoFolguera Telichevsky, AndresARC MIGRATIONBROKEN FORELANDGROWTH STRATAINTRAPLATE CONTRACTIONPATAGONIAN ANDESSYNOROGENIC DEPOSITShttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The origin, extent, and timing of intraplate contraction in Patagonia are among the least understood geological processes of southern South America. Particularly, the intraplate Deseado fold-thrust belt (FTB), located in the Patagonian broken foreland (47°–48°300 S), is one of the most enigmatic areas. In this belt, time constraints on tectonic events are limited and synorogenic deposits have not been documented so far. Furthermore, the driving mechanism for intraplate contraction remains unknown. In this study, we carried out a structural and sedimentological analysis. We report the first syntectonic deposits in this area in the Baqueró (Aptian) and Chubut (Cenomanian/Campanian) groups and a newly found unit referred to as the Albian beds (109.9 ± 1.5 Ma). Thus, several contractional stages in late Aptian, Albian, and Cenomanian-Campanian are then inferred. We suggest that the Deseado FTB constituted the southernmost expression of the early Patagonian broken foreland in Cretaceous times. Additionally, we analyzed the spatiotemporal magmatic arc behavior as a proxy of dynamic changes in the Andean subduction during determined stages of intraplate contraction. We observe a significant arc broadening from ~121 to 82 Myr and magmatic quiescence after ~67 Ma. This is interpreted as a slab shallowing to flattening process. Far-field tectonic forces would have been produced by increased plate coupling linked to the slab flattening as indirectly indicated by the correlation between Cretaceous arc expansion and intraplate contraction. Finally, the tectonic evolution of the Deseado FTB favors studies supporting inception of Andean shortening since Cretaceous times.Fil: Gianni, Guido Martin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; ArgentinaFil: Navarrete Granzotto, César Rodrigo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Liendo, Ingrid Florencia. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Díaz, Marianela Ximena Yasmin. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geología; ArgentinaFil: Gimenez, Mario Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto Geofísico Sismológico Volponi; ArgentinaFil: Encinas, Alfonso. Universidad de Concepción; ChileFil: Folguera Telichevsky, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; ArgentinaAmerican Geophysical Union2018-08-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/156162Gianni, Guido Martin; Navarrete Granzotto, César Rodrigo; Liendo, Ingrid Florencia; Díaz, Marianela Ximena Yasmin; Gimenez, Mario Ernesto; et al.; Cretaceous intraplate contraction in Southern Patagonia: A far-field response to changing subduction dynamics?; American Geophysical Union; Tectonics; 37; 9; 13-8-2018; 2915-29370278-74071944-9194CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018TC005173info:eu-repo/semantics/altIdentifier/doi/10.1029/2018TC005173info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2024-05-08T14:08:53Zoai:ri.conicet.gov.ar:11336/156162instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982024-05-08 14:08:53.573CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
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